Hi,
currently theme doesn’t have RTL support, but we have plans to do it in an update soon.
You can find out any used class from demo content, it is exactly the same as demo site. And you can have as many custom classes as you want, additional custom CSS code can be added via theme options.
Navigation can’t be changed directly, but you can unassign menu from top location, and add it via widget to sidebar.
Cheers